Miner&#39;s lamp.



fAttest: gQ/JLK Inventor:

I wmfi WQQMQ, Atty P. E. BALDWIN. MINERS LAMP.

APPLICATION FILED MAY 22, 1913.

1,101,982, Patefited June 30,1914.

lllll'l I I COLUMBM PLANOGRAPH Cm. WASHINGTON. D. c.

STATES FEEDER-IO E. BALDWIN, OF YORK, N. Y.

MINERS LAMP.

Specification of Letters Patent.

Application filed May 22, 1913. Serial No. 769,142.

To all whom it may concern Be it known that I, FREDERIC BALDWIN, acitizen of the United States, and a resident of Richmond borough, NewYork city, and State of New York, have invented certain new and usefulImprovements in Miners Lamps, of which the following is a specification.

In constructing acetylene lamps in general and particularly lamps foruse in mines, it is desirable that the flow of water to the carbid be asconstant as possible. It is also de sirable that this constant waterflow should be maintained automatically. It has been found in practicethat it is impossible to adjust the flow of water, manually, so that atall times justthe desired amount of water shall be constantly deliveredto the carbid. This result has been in part obtained by the use of apipe of suitable interior diameter and restricting the flow of waterthrough this pipe by inserting a wire of suitable out-- side diameter topermit of only such flow of water through the pipe as may be required tosupply gas to the burner. lVhen manufacturing these lamps in largequantities however, it has been found impossible to proportion the twodiameters so that the flow of water should be even approximatelycorrect. This difficulty arises from the necessity of using a fairlylong water tube in order to maintain the desired water column pressureand any slight deviation in the diameters of the wire and tube cause avery marked variation in the fiow of water, owing to the amount offriction on the water induced by the length of the restricted watertube. I overcome this ditliculty by having only one portion of thedevice restricted, the other portion of the device permitting of agreater flow of water, thus offering less friction to the water passingthrough than the restricted portion.

hen a water tube is closely restricted its full length, said tubeafi'ording part of the water column pressure and an occasional excess ofgas occurs in the lamp, this friction of the water in the tube largelyprevents the excess gas from flowing back through the water tube andescaping into the air with an offensive smell. In fact it has been foundby water gage test that owing to this friction, where the lamp isoperated under a 29,- water column pressure, the gas will frequently notescape out of the lamp up through the water tube before a 4" or oPatented June 30, 1914.

'water column pressure'is obtained inside of of carbid, that by cuttingthe exit orifice of the water tube at an angle, a steadier fiow of water1s maintained, as by thus increasing the delivery surface of the orificeit takes longer for the carbid so to clog'up the orifice that it has tobe broken up by the agitation of the stirring or poking wire.

It is to be understood that the desired restriction can be obtainedeither bydrilling a. I

portion of the tube larger or by making a portion of the stirring orpoking wire smaller.

In the accompanying drawing I have shown, in vertical section,chiefly,'a miner s lamp equipped with my improved means for regulatingand equalizing the water flow.

As shown the lamp is formed with an upper portion A, and a lower portionB, separated by the partition (6. The water is held I above thepartition and the carbid below.

C, indicates a reflector, and D, a burner tube. It is understood thatthe form and construction'of the lamp is not essential tothe use of mypresent invention but may be of 7 any of the ordinary and usual makes,or ofspecial design if preferred.

The feed tube E is of usual construction except that at its top portion6 for a short distance, the bore of the tube is somewhat contracted, sothat the flow of water past the stirring rod F, will be exactly thatwhich is required to supply the carbidconstantly and automatically withthe right amount of Water required for the proper generation of gas aslong as the tube is open. The length of the water tube is greater thanthe depth of the water tank, from which it results that variations inthe depth of the water in the tank causes only small variations in thewater column pressure. It is of course understood that the tube E, hangsdownward from the partition a, and is open into the water reservoirexcept when closed-by a suitable valve. As explained above the stirringrod F, is usually run through this feed tube and caused to project abovethe top of the lamp where it is bent over as shown to form a sort ofhandle by which it can be lifted and revolved to stir up and poke thecarbid which surrounds the bottom of the feed tube. The contraction ofthe bore of the feed tube at its upper end is not for the purpose ofentirely choking the tube but merely to form a passage around thestirring rod, as nearly as possible fitted to the quantity of water asrequired for a constant automatic supply.

As a valve for closing the top of the tube E, I have shown a telescopingtube G, which is lifted away from the tube E, to let the water flow andpushed down upon it to the position shown in the drawing to cut off thewater flow. This telescoping valve I do not claim here because I ammaking it the subject of a separate application Serial No. 768,775,filed May 20, 1913, nor do I claim the form of coupling shown in thedrawings whereby the upper and lower portions of the lamp are connected,this subject matter being claimed in my application Serial No. 768,200,filed ll/Iay 17, 1913.

I claim;

1. A miners lamp provided with a water feeding tube and a rod locatedlongitudi nally therethrough; the passage between the exterior of saidrod, and the inner wall of said tube being restricted during only aportion of its length to permit the quantity of water required for theproper operation of said lamp.

2. A miners lamp provided with a water tank, a carbid container, anelongated water feeding tube and a rod extending therethrough, thepassage between said rod and tube being constricted for a short distanceat its upper end so that only so much water will flow as will supply gasfor the desired flame, and being larger throughout the remainder of itslength.

3. A miners lamp provided with a water tank, a carbid container, anelongated water feeding tube and a rod extending therethrough, said rodbeing of substantially uniform diameter and the upper end of the bore ofsaid tube being slightly more constricted than the remainder thereof,the passage along the rod at the restricted portion being such as willpermit only enough water to flow to generate suflicient gas for the desired flame.

4:. A miners lamp provided with a water tank, a carbid container, anelongated water feeding tube and a rod extending there through, thepassage between said rod and tube being constricted for a short distanceat its upper end so that only so much water will flow as will supply gasfor the desired flame, and being slightly larger throughout theremainder of its length, the length of the water tube being greater thanthe depth of the water tank.

5. A miners lamp provided with a water tank, a carbid container, anelongated water feeding tube and a rod extending therethrough, said rodbeing of substantially uniform diameter and the upper end of the bore ofsaid tube being slightly more constricted than the remainder thereof,the passage along the rod at the restricted portion being such as willpermit only enough water to flow to generate sufiicient gas for thedesired flame, the length of the water tube being greater than the depthof the water tank.

FREDERIO E. BALDWIN.

Witnesses V. P. PREBLE, E. M. DOUGHTY.

Copies of this patent may be obtained for five cents each, by addressingthe commissioner of Patents, Washington, D. C.

